The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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A Study on the Performance Improvement for UWB Ranging in Multipath Environments by Modified Linear FM Signals

선형 주파수 변조 신호의 부엽 제거를 통한 다중 경로 환경에서의 UWB 위치 추정 성능 향상 기법

  • Lee Woo-Kyung (School of Electronics, Telecommunication and Computer Engineering, Hankuk Aviation University)
  • 이우경 (한국항공대학교 항공전자 및 정보통신공학부)
  • Published : 2006.06.01
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Abstract

Recently a new spectrum ruling has been proposed for UWB(Ultra-Wideband) communication applications. The new proposal is expected to reduce the usable UWB spectrum significantly and may cause to weaken the unique advantages of the UWB pulses such as high resolution synchronizations and robustness to the multipath effects. In this paper, we investigate the performance degradation caused by the reduced UWB spectrum. As a means to overcome the performance degradation, a modified discrete linear frequency modulation technique is proposed. We show that, when multipath components are present in the received signal, the proposed method exhibits superior performances in terms of pulse detection efficiency and range resolutions.

최근 논의되는 대로 향후 가용 UWB(Ultra-Wideband) 대역폭이 축소되면 기존 UWB 신호의 광대역 특성이 약해지고 특히 다중 경로 환경에서 성능 저하가 두드러질 것으로 예상된다. 본 논문에서는 향후 변경되는 UWB 허가 대역에서 펄스 발생을 용이하게 하고 에너지 효율성을 높이는 방법으로써 선형 주파수 변조 신호를 사용하는 방법을 제안한다. 주파수 변조 신호를 사용함으로써 다중 경로 환경에서 신호 감지 성능이 향상되고 UWB 통신에서는 신호 동기 특성이 향상됨을 보인다. 정합 필터와 부엽 제거 필터를 사용하는 수신단을 도입하여 신호대 간섭비를 높이고 거리 측정 오차를 더욱 감소시키는 기법을 소개한다.

Keywords

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